| |||
| recirculation des boues; recirculation f | |||
|
sludge return : 14 phrases in 4 subjects |
| Construction | 2 |
| Earth sciences | 2 |
| Environment | 5 |
| Natural resourses and wildlife conservation | 5 |
| |||
| recirculation des boues; recirculation f | |||
|
sludge return : 14 phrases in 4 subjects |
| Construction | 2 |
| Earth sciences | 2 |
| Environment | 5 |
| Natural resourses and wildlife conservation | 5 |